I am using an AVR300 along with a pair of quad ESL-57s and a Velodyne B-1500F subwoofer. I do not yet own a center or rear speakers. This weekend, I am auditioning a MartinLogan Theater i center channel speaker. I noticed that all of the Dolby 5.1 channels (on cable television broadcasts), as well as most of the non-Dobly 5.1 channels work fine. However, there are a number of non-Dolby 5.1 television channels which only send a signal to the center channel. Using the mode button on the AVR300's remote, I can send that signal to the front stereo speakers only, but not to the center and stereo speakers together. Is this normal? Is there a work-around? Also, does anyone have any experience with MartinLogan products? I am trying to match up the center and rears with my electrostatic Quads. I have previously auditioned the Magnepan home theater speakers. I really liked the rears, but thought the center speaker was a little tinny. Any thoughts would be greatly appreciated.